Indexhibit v2 Font style editor unable to select colour

I'm trying to use the font style editor plugin to alter the link colour, but when the colour picker box appears nothing happens when I use the cross hairs to select a colour, the box stays on screen, double clicking etc does nothing, only way to get rid of the colour picker is to click on the window displaying the other font style editor options, but the squares showing the link colour stay white ( which means links are now invisible). Am I missing something or is this a bug?

Thanks for responding, but nothing happens if I click the colour area with the cross hairs, so cannot actually select a colour, I can overtype the individual rgb values but this does not seem to select a colour either. If I click the circle/square button at the bottom right the whole colour picker disappears. Tried it with IE8 and Chrome.